The 2012 Mercedes-Benz GL450 has 3 recalls, the most serious being a driver's frontal airbag inflator that can rupture and send metal fragments into the cabin, posing a serious injury risk to the driver and passengers.
The brake booster, which provides the power assist that makes the brake pedal feel firm and responsive, can accumulate moisture inside its housing and corrode over time. When that happens, brake performance degrades and, in worse cases, the brakes can fail outright, significantly raising the risk of a crash. This issue affects a wide range of model years across the ML, GL, and R-Class lineup from that era, and prior repair attempts did not fully resolve the problem, which is why it appears as more than one filing.
At a glance
What can fail
Moisture can accumulate inside the brake booster housing and cause rust, potentially reducing braking power or causing complete brake failure.
What the fix does
Dealers will remove the rubber sleeve, inspect the brake booster, and replace it if needed at no cost.
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Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
Moisture can accumulate inside the brake booster housing, causing corrosion that reduces braking performance or causes brake failure.
What the fix does
Dealers will remove the rubber sleeve, inspect the brake booster, and replace it if necessary at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The driver's front air bag inflator may build up excessive pressure and rupture when the air bag deploys.
What the fix does
Dealers will replace the driver's front air bag module at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
